In reply to KellyKettle:
I have the Crux X2 Bomb, find it pretty awesome. the extra pole used to make a massive vestibule is certainly worth the weight on rainy days or when car camping. you can also buy the fly sheet of the crux storm separately and use it with the inner of the bomb if you want to shed some weight.
I usually split it between two of us, although i have carried it all by myself once or twice, no appreciable difference to my terra nova ultra quasar (although the scales says its a fair bit heavier).